package org.spring.demo.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author LHB
 * @date 2019/12/19 15:01
 */
@Configuration
@EnableAsync
public class TheadPoolConfiug {
    //实例化线程数量
    @Value("${thread.corePoolSize:5}")
    private Integer corePoolSize;
    //最大线程数量
    @Value("${thread.maxPoolSize:10}")
    private Integer maxPoolSize;
    //数据存储量
    @Value("${thread.queueCapacity:500}")
    private Integer queueCapacity;

    @Bean("threadPoolTaskExecutor")
    public Executor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 设置核心线程数
        executor.setCorePoolSize(corePoolSize);
        // 设置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        // 设置队列容量
        executor.setQueueCapacity(queueCapacity);
        // 设置线程活跃时间（秒）
        executor.setKeepAliveSeconds(60);
        // 设置默认线程名称
        executor.setThreadNamePrefix("MyThreadName-->");
        // 设置拒绝策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        return executor;


    }

}
